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公开(公告)号：US2437840A
公开(公告)日：1948-03-16
申请号：US52574044
申请日：1944-03-09
Applicant: CORNELL RES FOUNDATION INC
Inventor： WESTON STEWARD COLBY , RIVENBURGH MALCOLM R
IPC: B23K9/067
CPC classification number: B23K9/0678
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